In the 1950's and 1960's most of these WW2 sites could still be easily visited,which we kids did.I can remember the round pits where the guns would have been and the large ring of bolts sticking up in each.Were there three guns?It looks like it from the photo.There were tunnels leading back from each gun position.I suppose these went to the magazines.A military road ran behind these batteries going from what i know as Reach Road(near the light railway road crossing)to another military site behind the South Foreland lighthouse.I cycled this road many times.Another road branched off,looped round the front of the battery and rejoined the main military road. The tunnels at Fan Hole we visited several times usually going down the flights of stairs.An exit as shown on BenG's map came out down on the side of Fan Hole near to a sound mirror.I didn't like using it then(around 50 years ago)due to it's dodgy state.I would be most reluctant to do so now even if i was young and fit and it was still open.A walk along the footpath round the edge of Fan Hole brought us to another site.This if i recall correctly was a low structure dug into the chalk so as not to be exposed to the Germans in France.On the thick concrete roof or nearby was a steel structure.This could not so easily be concealed and was something to do with a lower level of radar detection than the not so distant Pylons. One of which has just been demolished.I can't recall where i got this info from about the radar but the building was there as i can remember walking on it's roof.Nearby is that strange shaft cut in the cliff going down to Fan Bay.

There are some lumps of concrete covering it and we have tried to shift it but we didnt have enough people to shift it and ended up with cut fingers and we lost a fence post in there. My first thoughts were that it looked liked an escape hatch for something, possibly for one of the magazines? I haven't been in the magazines yet, is something similar from the inside? I had alook at the above plans and cant see anything marked and its too small to see much from the aerial shots.